C312312111111331312111133133313331333133313232233133313133112321   >>    C31231211111133131211113313331333133313331323223313331313311232   <<    C312312111111331312111133133313331333133313232233133313133112323   >>      C312312111111331312111133133313331333133313232233133313133112322   >>